Preoperating Checklist - Walker D21d Operator's Manual

D21d
3. Measure the side-to-side level of the deck by
measuring from the ground to the top of the
deck housing at the front corners of the deck
as shown in the DS60-3 Deck Leveling illus-
tration. The side-to-side measurements
should not vary by more than 1/8 in. (3 mm).
If necessary, raise or lower the left and/or right
front support chain clevises to level the deck.
4. Measure the front-to-rear level of the deck
using a straight edge as shown in the DS60-3
Deck Leveling illustration. The rear measure-
ment should be 1/4 in. (6 mm) to 3/8 in. (10
mm) higher than the front measurement. If
necessary, adjust the right side height adjust-
ment rod by lengthening it to lower the back of
the deck, or shortening it to raise the back of
the deck.
5. With the side-to-side and front-to-rear deck
level correct, reattach the left rear support
chain that was removed in step 2. Adjust the
left side height adjustment rod to equalize the
left rear and right rear support chain tension.
6. Assure that all fasteners are tight and replace
any guards removed during the leveling proce-
dure.

PREOPERATING CHECKLIST

Before operating the mower for the first time, and
as a routine before daily operations, it is important
to make sure the mower is properly prepared and
ready for operation. The following is a list of items
to be checked. (For a mower with frequent opera-
tion, some of these items will not need to be
checked every day, but the operator should be
aware of the condition of each.)
For proper fuel and lubricants refer to Specifica-
tions on page 3.
F FILL FUEL TANK
Fill the fuel tank with clean, fresh fuel. Clean
diesel fuel is particularly important since con-
taminated fuel will damage the fuel injectors
and injection pump.
NOTE: An electric fuel pump makes it unnec-
essary to bleed (purge out air bubbles) the
diesel fuel injection system when initially fuel-
ing an empty fuel tank.
DANGER
Handle diesel fuel with care. Use safe refu-
eling procedures:
● DO NOT fill fuel tank with the engine
running.
● If the engine is hot, allow to cool before
refueling.
● Use an approved fuel container.
● Fuel the mower outdoors.
DO NOT smoke while refueling.
●
● Avoid spilling fuel; use a funnel or
spout.
● DO NOT overfill the fuel tank; fill up to
about 1 in. (25 mm) below the top of
tank.
IMPORTANT: DO NOT permit dirt or other
foreign matter to enter the fuel tank. Wipe dirt
from around the filler cap before removing.
Use a clean fuel storage container and funnel.
F CHECK ENGINE CRANKCASE OIL LEVEL
Check the engine crankcase oil level before
use and after each 5 hours of continuous
operation. Refer to Checking Engine Crank-
case Oil Level on page 60.
F CHECK AND SERVICE ENGINE AIR CLEAN-
ER SYSTEM
● Check air filter restriction gauge to make
sure the yellow indicator disk is in the safe
operating (green) range.
● Check condition, cleanliness, and security
of the complete air cleaner system (inspect
air filter paper element every 100 hours).
For detailed procedures, refer to Engine
Air Cleaner System on page 68.
F CHECK ENGINE COOLING SYSTEM
● Check the radiator air intake screen to
make sure the screen is clean and free of
obstruction. Also, the radiator cooling fins
should be inspected and cleaned if there is
any buildup of dirt or debris. (Remove the
intake screen assembly to inspect and
clean.)
Assembly Instructions
27